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Japan weather

Weather in Nagasaki for September 2025

Your guide to Nagasaki weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Nagasaki has been nearly identical to the historical average, with a temperature of 28.5 °C (showing only a slight deviation of -0.5 °C).

  • Expect cooler weather in the next days in Nagasaki with the forecast suggesting a temperature of 26.8 °C, lower than the historical average.

  • In general, the average temperature in Nagasaki at the beginning of September is 28.7 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 26.6 °C by the end of September.

    • Rain 🌧️

  • The climate of Nagasaki in September is notably wet, with an average of 11 rainy days, and a total of 79.8 mm of precipitation.

    • More

  • Is September a good time to visit Nagasaki? check out the best time to travel to Nagasaki page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/25°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Nagasaki Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
29°
2
Sunny
28°
3
Patchy rain possible
29°
4
Patchy light drizzle
28°
5
Patchy rain possible
29°
6
Patchy rain possible
29°
7
Partly cloudy
29°
8
Patchy rain possible
30°
9
Sunny
30°
10
Partly cloudy
29°
11
Light rain shower
30°
12
Patchy rain possible
29°
13
Sunny
29°
14
Patchy rain possible
32°
15
Patchy rain possible
29°
16
Patchy rain possible
29°
17
Patchy rain possible
29°
18
Moderate rain
28°
19
Moderate rain
26°
20
Patchy rain possible
27°
21
Patchy rain possible
24°
22
Patchy rain possible
26°
23
Patchy rain possible
27°
24
Patchy rain possible
27°
25
Heavy rain
22°
26
Patchy rain possible
26°
27
Sunny
28°
28
Patchy rain possible
28°
29
Sunny
28°
30
Patchy rain possible
27°

Temperatures trend during September in Nagasaki

See the weather trend as well as the moving average line

September weather in Nagasaki day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 29° /24° 2.8 mm 7
2 Sept. Sunny
Sunny
 28° /25° 5.6 mm 7
3 Sept. Patchy rain possible
Patchy rain possible
 29° /24° 0.5 mm 7
4 Sept. Patchy light drizzle
Patchy light drizzle
 28° /23° 32.7 mm 6
5 Sept. Patchy rain possible
Patchy rain possible
 29° /25° 0.3 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 29° /24° 0 mm 7
7 Sept. Partly cloudy
Partly cloudy
 29° /25° 1.8 mm 7
8 Sept. Patchy rain possible
Patchy rain possible
 30° /25° 1.2 mm 7
9 Sept. Sunny
Sunny
 30° /25° 2.8 mm 7
10 Sept. Partly cloudy
Partly cloudy
 29° /25° 8.1 mm 7
11 Sept. Light rain shower
Light rain shower
 30° /25° 2.9 mm 7
12 Sept. Patchy rain possible
Patchy rain possible
 29° /25° 4.5 mm 7
13 Sept. Sunny
Sunny
 29° /26° 7.6 mm 7
14 Sept. Patchy rain possible
Patchy rain possible
 32° /26° 0 mm 7
15 Sept. Patchy rain possible
Patchy rain possible
 29° /26° 1.4 mm 2.1
16 Sept. Patchy rain possible
Patchy rain possible
 29° /26° 0.3 mm 1.8
17 Sept. Patchy rain possible
Patchy rain possible
 29° /26° 2.2 mm 1.4
18 Sept. Moderate rain
Moderate rain
 28° /25° 9.8 mm 1.5
19 Sept. Moderate rain
Moderate rain
 26° /24° 13.2 mm 5
20 Sept. Patchy rain possible
Patchy rain possible
 27° /24° 1.5 mm 6
21 Sept. Patchy rain possible
Patchy rain possible
 24° /23° 0.7 mm 5
22 Sept. Patchy rain possible
Patchy rain possible
 26° /23° 3.6 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 27° /23° 3.5 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 27° /22° 2.3 mm 5
25 Sept. Heavy rain
Heavy rain
 22° /22° 44.5 mm 5
26 Sept. Patchy rain possible
Patchy rain possible
 26° /21° 3.9 mm 5
27 Sept. Sunny
Sunny
 28° /22° 0 mm 6
28 Sept. Patchy rain possible
Patchy rain possible
 28° /24° 0.3 mm 6
29 Sept. Sunny
Sunny
 28° /23° 0 mm 7
30 Sept. Patchy rain possible
Patchy rain possible
 27° /23° 0.6 mm 6
Next
Important Notice
Our weather forecast for Nagasaki in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Nagasaki forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
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Nagasaki weather in September vs August vs October

Compare September weather in Nagasaki with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures30°/26°29°/25°24°/19°
Rainfall133 mm80 mm60 mm
Wind17.8 km/h13.6 km/h18.3 km/h
Humidity78%76%74%
Rainy days16 days11 days11 days
Dry days15 days19 days20 days

Planning a trip to Nagasaki? Discover the best time to visit

Nagasaki in September - FAQ

What are the expected maximum and minimum temperatures in Nagasaki during September?
During September, expect a variety of temperatures with highs around 29° and lows near 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in Nagasaki during September?
Moderate rainfall is anticipated in Nagasaki during September, with a total of 79.8 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Nagasaki during September?
The average wind speed in Nagasaki during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Nagasaki in September?

As you prepare for your trip to Nagasaki in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Nagasaki, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
    • Sandals/Flip-flops: Comfortable for warm climates
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

September rainfall patterns in Nagasaki

Explore the daily rainfall trends and prepare for Nagasakis September weather 💧

UV exposure in Nagasaki during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Provinces in Nagasaki
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Get accurate weather forecasts for Nagasaki, located at latitude 32.75 and longitude 129.883. Stay updated with localized weather information tailored for Nagasaki.

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